Fair Value Measurements (Schedule Of Valuations Of Investments And Financial Instruments) (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	$ (7,099,000)	$ (7,402,000)
Fair Value Inputs Entity Credit Risk	5.00%
Fair Value, Changes In Liability, Credit Spread Impact, Value	700,000
Fair Value Assumptions Expected Volatility Rate	5.00%
Fair Value, Changes In Liability, Volatility Rate Impact, Value	500,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	$ (7,099,000)	$ (7,402,000)